Is it advisable to use IP addresses in addition to timestamps for tracking online users in PHP?

Using IP addresses in addition to timestamps for tracking online users in PHP can provide more detailed information about user activity. However, relying solely on IP addresses for user tracking can be problematic due to factors like shared IP addresses and dynamic IP assignments. Therefore, it is advisable to combine both IP addresses and timestamps for a more accurate tracking system.

// Sample code to track online users using IP addresses and timestamps
$ip = $_SERVER['REMOTE_ADDR'];
$timestamp = time();

// Store the IP address and timestamp in a database or file for tracking purposes
// Example: INSERT INTO user_tracking (ip_address, timestamp) VALUES ('$ip', '$timestamp');